In the final episode, which was directed by star William Brent, Roman and Riker’s black swarm returns, so the Elite Force hops into action to protect Centium City and there’s more than meets the eye with Chase’s new girlfriend Reese.

Spencer Boldman, who starred as Adam on the original Lab Rats, and Lab Rats: Bionic Island, wrote a sweet farewell note on Twitter.

“Lab Rats has forever changed my life & I have nothing but gratitude for the opportunity Disney @CPetey222 & @MooreBryan have given me. Will never be able to thank the fans enough for my four years on the show, and want to congratulate the new cast on this past season, over 100 episodes later, it’s because of all of you I’ve been afforded the opportunities in my life and you all, that show and our entire cast and crew will always have a piece of my heart,” he wrote.

He added, “Unbelievably excited to see what the future has in store for everyone who has been apart of the show, new and old. I’m so proud of what we did.”